Electric heater.



M. M. KUHN.

ELECTRIC HEATER.

urLwA'rIol msn 001.1, 190s.

Patented Feb. 7, 1'911.

2 SHEETS-SHEET 2.

MILTON M.

xoHN, or Nnwv Yoan, N Y.

ELECTRIC V HEATER.

Specification of Letters Patent.

Patent-euren. k'2, 1911.

Application med october 1, 1909. Ysenin1ra-520,515.

To all whom it may conce'm Be it known that I, MILTON M.`1oHN,/a

I citizen of the United States,a1d a resident of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Electric Heaters, a specification.

My invention vrelates lto electric heaters] and the object of my invention is `to provide a heater of this character which is provided with separate heating units so that it one ot the heating units should burn outor become defective, it may bc replaced .by another or the remaining units he used until' a new one can be obtained.

A further object of my invention is to provide a heater that is simple7 and of durable construction and provided with a chamber that can bc readily closed and in which metals may be melted.

A further object is to provide a heater having its heating coils of a proper resistance so that by a simple double throw switch the 'elements may be coupled to cause the heating electric current to flow through the heating coils in series vor in multiple :,o that -the heater may be used directly on a line carrying ll() or 220 volts, and therefore a feature of my construction is to use the said heating units in pairs, or multiples of two, four, six, etc.

Another object of my invention is to in` close the conductors in separate channels so they are protected ,from the atmosphere as iar as possible, to protect them from rapidly oxidizing, and from being accidentally struck or displaced in use.

Referring to the drawings which'` it'orm part ot this specification, .Figure l is a cross sectional vieu' through a heater e1nbodyino my invention. Fig. 2 is a plan view ol. the saine, the top sealing lid being; re moved to disclose the sectional construction. Fig. Il is a sectional view of a portion of the heater and discloses one of the sectional units and the wiring leading' troni the cxterior of the heater to one ot` the upper terminals. circuits and switch control ot' same. Fig. 5 is a perspective view of ont: of the heater units-With the wiringr which forms they heat generating element, removed.

A, indicates the body portion ot a heater embodyinp, one torni ot my invention, and is made of'any material which is a good of which the following is Fig. 4 is a diagram illustrating the' 1s formed with acomparatively thick bottom Wall A which vsupports a cylindrical portion A2 l,which is located about half waybe'- tween the inner outer metal sheathing is formed in the mit. the pot to the same centrally in reference to the wall A2. The top of the pot B, the sides of which serve as a lining, is in linewith the .top of the cylindrical W'all A2, and an annular space D is thus formed betweenthe wall A2 and outer sides of the pot B, in which is lo'- cated a plurality of forms E-E, etc. Each of these forms is made of non-conducting material such as pressed clay or asbestos, and is made to Fit into the annular space D loose enough to be easily removed in case of necessity. There are four of these forms used inv the present construction shown, but any number may be used, depending on the I prefer to use bottom A as shown, toper;

construction desired, but them in pairs so that they may be connected in series or multiple, and the current evenly divided when connected in multiple. Each of the said forms is E', of which four are shown in the present construction, and loc'ated in each of said grooves is the heating medium, in this case illustrated as a coiled wire, and indicated by F. One end of this wire is connected to one of the screws F and is ledtownward to t-he bottom of the groove nearest to said screw where a short section .of the coil is lstraightened and led through a slot E2 formedin the bottom of the form E, and the coil then continued upwardto the top of groove No. 2, downward through'groove No. 3 and upward through groove No. t screw F2, thence through thc metal stripfG to binding screw F, and to the coil in the adjacent form, terminal, this heater being shown with the coils connected in series. lThe depression E3 in the form E 'permits the short section of wire connecting the adjacent coils to pass over from one groove to the next without projecting above the top end ofthe form.

Itis obvious thata burned out coil can be easily removed and replaced by a new one since there is nothingr to hold the coils in place except the walls of the lining` and grooves, from which they may be easily removed and4 replaced non-conductor of heat, such as fire clay, and.

provided with grooves to the binding,r

and thus on around to the by'ancw set of coils,

lining or pot', B, and theg.

C. A depression A.a

set snugly therein and support sol which may be kept in reserve for the pur pose. The binding osts H and I, are the terminals of the con uctors and are held to the sheathing C by forming recesses as Jl in the bottom A in which is placed a nut K, and the binding post H is provided with a shoulder and a screw which engages the nut K and thus clamps the sheathing firmly. The wire L is passed upward through a packing of asbestos M, which surrounds the wall or cylinder A, to the metal ,strips Grk and the return wire to the opposite binding .postpis connected to the terminal strip 'G'.

A cover N, rest-s on 'the top edge of the l sheathing C, and above this is a lil O which extends flush with the outer edge of they Asheathing C and inner edge ofthe potB as" shown, and visprovidcd with ,-holes through which the bolts P-P etc. project." The sheathing C is provided with corner flanges which project below the bottom of the body portion, and is provided with holes through which bolts are passed which extend upward through the body portion and lid as indicated in dotted lines in Fig. 3, and thumb nuts engage thebolts and thus clamp the parts tightly in place.

Referring' to Fig.

i, EME-n n indicate the tour i'orins,1 containing coils as heretolorc set iorth, connected in circuit by a double throw switch ll'. As now shown the units are connected in multiple. By thi'owing the switch in the opposite contacts, the coils will be connected in series as will be readily understood.

I do not wish to limit myself to the exact form shown, but reserve to myself the cons strnctions t-hat come within -the scope otl my claims as allowed.

Having thus described my inventioinwhat l claim as new and desire to secure by Letters Patent. is:

l. An electric heater comprising a body portion, a plurality oi forms which are duplicates ot each other, a heating element located ineacli ol saidiorliis and removable therefrom. without injury thereto, means located in said body portion tor connectjng the ends of said heating elements and a lining wall adjacent s:1itl.t'oi'nis and having a chamber 'tornud therein.

l?. A\ heater comprising a body portion having an upwardly extending cylindrical wall, aplurality ol removable forms shaped to contorni to .said upwardly extending wall and each pro\ided with an electrical conductor. a separable inner wall located adjacent 1o said t'ornls and having a chambei' formed therein, and means t'or covering the top ol .said forms. i

3. An elect ric heater comprising'a body portion having an upwardlyextending wall, a plurality ot tornis located adjacent to said wall, an electric conductor carried by each form, mains for connecting thef-conductorsv in one form to that of an adjacent form,

means for connecting said .conductors in series or multiple circuit arrangenient.

4. A heater comprising a body portion having an upwardly extending cylindrical wall, a. plurality of removable forms shaped to conform to said upwardly extendinfr wall and each provided with an electrica con* ductor,A an .inner wall located adjacent to said for-nis, and means for covering the top ends of said forms.

5. n electric heater comprising a body portion having an upwardly extending vcylindrical wall, a lining' portion located within said body portion, and forming between itsfouter surface and said upwardly ex` tending wall, an annular chamber, a plurality of forms located in said annular chamber `eachott which is Iprovided with an electrical conductor, and means tor covering said forms and electrical conrflnctors to provide a closed annular' chamber.

portion having an upwardly extending wall, a. lining portion within said body portion and -whieh contributes to Vl'oriu a chamber between said lining portion and said wall, a plurality ol' forms within said chamber cach of which is provided with an electrical conductor,ainl means for covering said chamber to 'torm a closed chamber.

7. An electric heater comprising a body portion havingr an upwardly extending wall. a pot in :said body portion, a plurality ot removable i'orms located ljiet'ween said pot and said wall. electrical conductors carried by said forms. a cover extending across the top of said body portion, and forms, and n 2ans lor holding said cover in position on said heater.

8. An electric heatercomprising a body portion having an upwardly extending wall, a plurality ot' i'ornis located adjacent to said Vall` an electric conductor carried by each form, means tor connecting the conductors in one torni to that ot an adjacent form, and means i'or covering and holding said foiins in position within the body portion.

5l. An electric heater comprising a body nular wall, a poty located in said body portion having an upwardly extending wall', a plurality ot forms located between the walls ot' said pot and said body portion, an electrical conductor in each torni, means for connecting the ends olf said electrical core' doctors together, a sheathing which incloses said walls. a cover for said heater,. and means for holding said sheathing and cover to said body portion. 10. `A heater comprisinlY a body portion having an upwardly extending annular wall,

means for covering and holding said forms' in position within the body portion, and

(l. An electric heaterI comprising a body fa pot having Ian 'upwardly extending` cy,r

portion having an upwardly extending anlindrieal Wall, a plurality of separableforms located between the Wall of said pot and said upwardly extending wall each of 'said forms being provided with a plurality of grooves, heating condctors located in sziid grooves,l means for connecting the 4ends of .said conductors together, :1 sheathing surroundinff the Vbody of s'aid body portion' a non-conf meting .material located. between' the 1 outer Surface of sr-.idupvardly extending wall 'and' said -bheathing2 al cover .for Said non-nondiicting mterizil, and a cover ex- 1lending above said first named cover and the 'tops oi' said wall und forms, und `means for A holding said covers vand l@heatlung to sa1d` body portion.

11. A healter comprising a body portion having an upwardly extendiny cylindrical wall, :i plurality of removable orms shaped to conform to said upwardly extending wall and each provided with un electrical conductor@ separable inner wall located adjecent to said forms and means for covering the top ends of said forms.

ASigned at N ew York in vthe county of New York and Statefof New York this 30th day of September A. 11.1909.-

MILTON M. Kom.

fWitnesses FRANK'M. ASHLEY, E, F. MUnDoc. 

